User Guide

Model 373A User Guide Issue 1, April 2019
Studio Technologies, Inc. Page 9
MODEL 373A
INTERCOM BELTPACK
connectors are essentially electrically wired
in parallel. (Only the right-channel head-
phone output is connected to Headset B.) As
such, only one headset should be connected
at one time.
Headset A
The Model 373A provides a 4-pin male XLR
connector that interfaces with the micro-
phone and headphone connections of a
monaural single- or dual-ear intercom- or
broadcast-style headset. The connector is
labeled Headset A. Refer to Figure 2 for
connection details. The microphone input
connections are compatible with most un-
balanced dynamic or electret (low-voltage
DC-powered) microphones. A balanced
dynamic microphone should, in most cases,
also function correctly if its signal – (low) is
connected to Model 373A’s mic in –/shield/
screen connection. No support is provided
for microphones that require P12 or P48
phantom power.
2 connection, and the microphone on the
sleeve connection. Compatible headsets
are readily available, typically described
as personal computer or gaming headsets.
The microphones used in these headsets
are electret type which require a low-
voltage DC source for operation. The
Model 373A is able to provide this power
and requires only that the appropriate set-
ting in STcontroller be selected. Refer to
Figure 3 for a detailed description of the
compatible TRRS plug.
Figure 2. Headset A connection pinout chart
Headset B
The Model 373A also allows direct con-
nection of stereo gaming headsets that
are ubiquitous in the personal computer
world. The 3.5 mm 4-conductor TRRS jack,
labeled Headset B, is compatible with the
CTIA™/AHJ configuration standard which
has the headphone left channel on the tip
connection, the headphone right channel on
the ring 1 connection, common on the ring
Figure 3. Headset B connection pinout chart
Dante Configuration
For audio to pass to and from the Model
373A requires that several Dante-related
parameters be configured. These configu-
ration settings will be stored in non-volatile
memory within the Model 373A’s circuitry.
Configuration will typically be done with
the Dante Controller software application
which is available for download free of
charge at www.audinate.com. Versions of
Dante Controller are available to support
Windows® and OS X® operating systems.
The Model 373A uses the Ultimo 2-input/
2-output integrated circuit to implement the
Dante architecture. One transmitter (output)
channel and both receiver (input) channels
are utilized.
The Dante transmitter (output) channel
associated with the Model 373A’s Dante
interface must be assigned to the de-
sired Dante receiver (input) channel. This
achieves routing the Model 373A’s one
talk output audio channel to the device